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タイトル: Noniterative approach to the missing data problem in coherent diffraction imaging by phase retrieval.
著者: Nakajima, Nobuharu
掲載誌名: Applied optics
出版者: Optical Society of America
巻: 49
号: 21
開始ページ: 4100
終了ページ: 4107
出版日付: 2010-07-20
NDC: 425
注記: When a very intense beam is used for illuminating an object in coherent x-ray diffraction imaging, the intensities at the center of the diffraction pattern for the object are cut off by a beam stop that is utilized to block the intense beam. Until now, only iterative phase-retrieval methods have been applied to object reconstruction from a single diffraction pattern with a deficiency of central data due to a beam stop. As an alternative method, I present a noniterative solution in which an interpolation method based on the sampling theorem for the missing data is used for object reconstruction with our previously proposed phase-retrieval method using an aperture-array filter. Computer simulations demonstrate the reconstruction of a complex-amplitude object from a single diffraction pattern with a missing data area, which is generally difficult to treat with the iterative methods because a nonnegativity constraint cannot be used for such an object.
ISSN: 00036935 OPAC
E-ISSN: 15394522 OPAC
出版者DOI: 10.1364/AO.49.004100   
PMID: 20648195
NII書誌ID: AA00543409 OPAC ciniib
バージョン: author
出現コレクション:05. 雑誌論文・記事(Journal Article, Article, Preprint)

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